<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
/*        基本网格布局*/
        .Grid {
            display: flex;
        }

        .Grid-cell {
            flex: 1;
        }
    </style>
</head>
<body>
<div class="Grid">
    <div class="Grid-cell">
        1/3
    </div>
    <div class="Grid-cell">
        1/3
    </div>
    <div class="Grid-cell">
        1/3
    </div>
</div>
</body>
</html>